[How to get the best results] To get the best results, you need to soak your feet for five minutes or more, which will completely soften the dead skin and calluses on the soles of your feet and make it easier to use the foot file. When you encounter very hard and thick dead skin, first grind this part of the dead skin with a rough gravel surface, and then cut it with a fine gravel surface. [U-shaped design, well-fitting the foot] The U-shaped design is more suitable for the heel than most flat-bottomed files on the market. If you use a flat file, you need to rub from multiple angles to clean the entire soles of your feet. The U-shaped foot file adapts to the shape of your foot, especially the skin on the heel, and can be cleaned with a few brushes. [Recommended by podiatrists] The accumulation of dead skin on the feet can easily lead to the growth of bacteria and fungi. Regular removal of dead skin not only makes the foot skin more delicate and smooth, but also removes stubborn flora caused by old dead skin. Using our products can help you remove dead skin more effectively and thoroughly. [Double-sided file, multi-function] Each file contains a coarse gravel surface and a fine gravel surface. The rough gravel surface removes stubborn dead skin and calluses and is smooth to use. The fine gravel surface can be used to soften and smooth the feet without harming the skin. [Implement salon-level care at home] You don't need to go to a pedicure treatment, you just need to use it at home to easily enjoy salon-level foot care. Note: The data are all measured manually, please allow 1-3cm error Due to differences in light and display, there may be some color differences, please refer to the actual item received.